[PATCH] clk: sunxi-ng: fix ccu_mmc_timing.c kernel-doc issues

[Stephen Boyd]

Quoting Randy Dunlap (2022-11-22 10:48:44)
> Use '-' to separate the function name and its description.
> Use '%' on constants in kernel-doc notation.
> Use the kernel-doc Return: format for function return values.
> 
> Fixes this warning:
> ccu_mmc_timing.c:21: warning: No description found for return value of 'sunxi_ccu_set_mmc_timing_mode'
> 
> Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
> Cc: Yang Li <yang.lee at linux.alibaba.com>
> Cc: Chen-Yu Tsai <wens at csie.org>
> Cc: Jernej Skrabec <jernej.skrabec at gmail.com>
> Cc: Samuel Holland <samuel at sholland.org>
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-sunxi at lists.linux.dev
> Cc: Michael Turquette <mturquette at baylibre.com>
> Cc: Stephen Boyd <sboyd at kernel.org>
> Cc: linux-clk at vger.kernel.org
> ---

Reviewed-by: Stephen Boyd <sboyd at kernel.org>